Power Exchange Option

Power Exchange Option is a
direct subtype of MultiAsset Option with functions Power Exchange Option Functions, keys Power Exchange Option keys and example object PEO that represents a combination of a spread and power option.
The payoff is given by:
max{ λ₁S₁(T)ᵅ¹-λ₂S₂(T)ᵅ² , 0 }
λ₁, α₁, λ₂, α₂ are all constants and
S₁(T), S₂(T) are the prices of two specified underlyings at the option expiry time T

The following features are currently not supported:
American exercise, barriers, discrete dividends/storage costs.

European options having this payoff can be priced using
Pricing Method = BlenmanClark